Numerical Modeling of Non-linear Thermal Stress in Direct Metal Laser Sintering Process of Titanium Alloy Products

2016 ◽  
Author(s):  
Xinran Zhao ◽  
Patcharapit Promoppatum ◽  
Shi-Chune Yao
Keyword(s):  
Numerical Modeling ◽  
Titanium Alloy ◽  
Thermal Stress ◽  
Laser Sintering ◽  
Sintering Process ◽  
Direct Metal Laser Sintering ◽  
Non Linear

Direct metal laser sintering process investigation: application to 3D slotted waveguide antennas

2017 ◽  
Vol 11 (14) ◽  
pp. 1921-1929 ◽  
Author(s):  
Annaig Martin‐Guennou ◽  
Yves Quéré ◽  
Eric Rius ◽  
Christian Person ◽  
Shaima Enouz‐Vedrenne ◽  
...  
Keyword(s):  
Laser Sintering ◽  
Sintering Process ◽  
Direct Metal Laser Sintering ◽  
Slotted Waveguide

Numerical Simulation of Direct Metal Laser Sintering of Single-Component Powder on Top of Sintered Layers

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
Bin Xiao ◽  
Yuwen Zhang
Keyword(s):  
Laser Scanning ◽  
Three Dimensional ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Liquid Pool ◽  
Sintering Process ◽  
Direct Metal Laser Sintering ◽  
Three Dimensional Model ◽  
Gaussian Laser Beam ◽  
Scanning Velocity

A three-dimensional model describing melting and resolidification of direct metal laser sintering of loose powders on top of sintered layers with a moving Gaussian laser beam is developed. Natural convection in the liquid pool driven by buoyancy and Marangoni effects is taken into account. A temperature transforming model is employed to model melting and resolidification in the laser sintering process. The continuity, momentum, and energy equations are solved using a finite volume method. The effects of dominant processing parameters including number of the existing sintered layers underneath, laser scanning velocity, and initial porosity on the sintering process are investigated.

Microstructure and Tensile Strength of Rapid Manufacturing Parts

2014 ◽  
Vol 903 ◽  
pp. 114-117 ◽  
Author(s):  
Izhar Abd Aziz ◽  
Brian Gabbitas ◽  
Mark Stanford
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Biomedical Applications ◽  
Bulk Material ◽  
Solidification Rate ◽  
Laser Sintering ◽  
Liquid Pool ◽  
Sintering Process ◽  
Direct Metal Laser Sintering ◽  
Production Route

The purpose of this work is to investigate the microstructure and tensile strength of Ti6Al4V pre-alloyed powders produced by a direct metal laser sintering technique. Traditionally, Ti6Al4V products for biomedical applications were produced through hot working or machining of wrought semi-finished products. A change in the production route for manufacturing Ti6Al4V products, from the more traditional methods to an additive manufacturing route, requires an investigation of microstructure and mechanical properties because these are strongly influenced by the production route. The microstructure obtained through rapid solidification during laser sintering shows a very fine α+β lamellar morphology. There is also evidence of martensite which was expected due to high solidification rate of the liquid pool from a temperature above the β-transus during the laser sintering process. Structurally, good mechanical properties which are comparable to the bulk material were obtained.

Material Analysis of Titanium Alloy Produced by Direct Metal Laser Sintering

2013 ◽  
Vol 7 (2) ◽  
pp. 43-50 ◽  
Author(s):  
J. Sedlák ◽  
M. Ptáčková ◽  
J. Nejedlý ◽  
M. Madaj ◽  
J. Dvořáček ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Laser Sintering ◽  
Direct Metal Laser Sintering ◽  
Material Analysis
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